General strategy for evaluating the d-band center shift and ethanol oxidation reaction pathway towards Pt-based electrocatalysts  

作　　者：Jin-Hong Zheng Guang Li Jun-Ming Zhang Ningyan Cheng Li-Fei Ji Jian Yang Jialin Zhang Bin-Wei Zhang Yan-Xia Jiang Shi-Gang Sun 

机构地区：[1]State Key Laboratory of Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [2]School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China [3]Center of Advanced Energy Technology and Electrochemistry,Institute of Advanced Interdisciplinary Studies,Chongqing University,Chongqing 400044,China [4]Key Laboratory of Magnetic Molecules&Magnetic Information Materials Ministry of Education,School of Chemical and Material Science,Shanxi Normal University,Taiyuan 030031,China [5]Information Materials and Intelligent Sensing Laboratory of Anhui Province,Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education,Institutes of Physical Science and Information Technology,Anhui University,Hefei 230039,China

出　　处：《Science China Chemistry》2023年第1期279-288,共10页中国科学（化学英文版）

基　　金：granted by the National Natural Science Foundation of China(22172134,22288102,22279011);Fundamental Research Funds for the Central Universities(2022CDJXY-003)。

摘　　要：The catalytic performance of Pt-based catalysts depends sensitively on their d-band centers.Nevertheless,there are still huge challenges to evaluate their d-band centers from experimental technologies,and modulate them to analyze their selectivity in ethanol oxidation reaction(EOR).Here,Pt1Au1alloy supported on the commercial carbon material(Pt_(1)Au_(1)/C)is employed as a typical example to investigate its d-band center shift of surface Pt,and as electrocatalysts to study its selectivity towards EOR.Significantly,a highly reliable in situ Fourier-transform infrared spectroscopy CO-probe strategy is developed to characterize the d-band center shift of surface Pt.The modified electronic effect and site effect of Pt_(1)Au_(1)/C dictated the adsorption configuration of intermediate species and the OH species coverage,thereby influencing its selectivity.More importantly,we developed a universal cyclic voltammetry peak differentiation fitting method as an electrochemical analysis technique to investigate CO_(2)selectivity,which is potentially extendable to other Pt-based electrocatalysts.

关 键 词：PtAu in situ FTIRS d-band center ethanol oxidation reaction CV peak differentiation fitting method 

分 类 号：O643.36[理学—物理化学]